• Journal of Korean Society of Coastal and Ocean Engineers
• /
• v.21 no.1
• /
• pp.79-90
• /
• 2009

This paper presents the development of dynamically combined Typhoon generated surge-tide-wave numerical model which is applicable from deep to shallow water. The dynamically coupled model consists of hydrodynamic module and wind wave module. The hydrodynamic module is modified from POM and wind wave module is modified from WAM to be applicable from deep to shallow water. Hydrodynamic module computes tidal currents, sea surface elevations and storm surges and provide these information to wind wave module. Wind wave mudule computes wind waves and provides computed information such as radiation stress, sea surface roughness and shear stress due to winds. The newly developed model was applied to compute the surge, tide and wave fields by typhoon Maemi. Verification of model performance was made by comparison of measured waves and tide data with simulated results.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2004.11a
• /
• pp.709-712
• /
• 2004

응용프로그램이 복잡해지고 사용 환경이 다양해짐에 따라 신뢰성 높은 소프트웨어 생산을 위한 테스트가 중요시 되고 있다. 소프트웨어를 테스트하기 위해서는 각 기능에 따라 동작하는 모듈이 합당한 동작에 대해서 분석해야한다. 모듈은 다수의 실행경로로 이루어져 있으며 각 실행 경로에 따라 다른 결과를 출력하도록 설계되어 있다. 본 논문은 실행 경로에 따른 모듈의 인자를 자동으로 생성할 수 있는 방법을 제안한다. 프로그램은 블록간의 제어문 결합으로 이루어져 있고 다른 실행 경로를 생성하는 요인은 프로그램내의 제어문을 통해 결정된다. 그러므로 블록간의 결합을 제어의 종류에 따라 연산으로 표현하고 연산의 특성을 분석한다. 그리고 블록의 속성은 조건식을 가지고 있어 블록이 실행되는 조건을 표현한다. 각 연산의 특성에 맞게 조건식을 연산하여 블록이 동작하는 조건을 확인하고 최종적으로 실행 경로에 따른 모듈의 인자를 구하는 방법을 제안한다. 이 방법은 조건식에 영향을 주는 명령만을 추출하는 방법으로 인자를 구하기 위한 계산의 로드를 줄이는 장점이 있다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.16 no.6 s.97
• /
• pp.580-585
• /
• 2005

Two high-efficiency and high power power-combing modules were developed using slotline-to-microstrip transition at V-band. Power-combining modules incorporating two MMIC power amplifiers demonstrated combining efficiencies higher than $80\%$(maximum $86\%$) with saturated output power of 22.96 dBm and 22.81 dBm, respectively. The measurement of back-to-back connected combiners demonstrated insertion loss less than 1.2 dB with return loss better than 15 dB around 60 GHz, respectively.

• Elastomers and Composites
• /
• v.44 no.4
• /
• pp.366-372
• /
• 2009

The present study covers the optimal design for a lens module in a mobile phone camera by using the design of experiments (DOE) and finite element (FE) analysis. FE analyses are performed to investigate the effect of design parameters on the amount of torque required to assemble a barrel and a housing part. The DOE approach is then performed to optimize the design parameters in order to maintain an appropriate torque with less variations.

• The KIPS Transactions:PartD
• /
• v.16D no.1
• /
• pp.93-104
• /
• 2009

Modular implementation of a feature is a first step toward feature-oriented product line engineering, which develops and then utilizes core assets to configure products in terms of features. Aspect-oriented programming provides effective mechanisms for improving the modularity of feature implementations. However, as features in general are not independent of each other, changes in the implementation of one feature may cause changes to or side effects in the implementation of other features. Moreover, since the time at which a feature is incorporated into products, called feature binding time, may be various from compile time through load time to run time, a feature may have to be implemented differently depending on when the feature is bound into a product. To make each feature implementation module as independent as possible, this paper proposes aspectual implementation patterns that can effectively separate feature dependencies as well as feature binding time from feature implementation modules. These patterns enable flexible composition of feature implementation modules without affecting other modules according to feature selection. The approaches are demonstrated and evaluated based on a product line of scientific calculator applications.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.12 no.1
• /
• pp.19-26
• /
• 2002

There are some difficulties to construct a sensory-motor controller for an autonomous mobile robot such as coordinating the mechanics and control system parts of the robot, and managing interaction with external environments. In previous research, we evolve the CAM-Brain, neural networks based on cellular automata, to control an autonomous mobile robot. In this paper, we propose the method of combining multi-modules evolved to do simple behavior in order to making more sophisticated behaviors because the controller composed of one neural network module is difficult to make complex behaviors. In experimental results, we can get the controller adapting to more complex environments by combining CAM-Brain modules evolved to do simple behavior by rule-based approach.

• Journal of Satellite, Information and Communications
• /
• v.9 no.1
• /
• pp.17-21
• /
• 2014

In this paper, we proceeded a study about the wireless endoscopic technology development combined with UWB communication module for endoscope. Firstly, we proposed needs of UWB wireless endoscope technology development related to domestic endoscope industry and UWB communication technology. Also, we develop a wireless endoscope combined with UWB communication module. In this paper, the proposed UWB wireless endoscope technology can acquire a endoscope image using UWB communication method. It can transfer a image at high data rate using DB and Smart Device linkage technology, an effective and trusted diagnosis is possible. The proposed UWB wireless communication module combined with UWB communication module is expected to be widely utilized.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 1999.06b
• /
• pp.9-13
• /
• 1999

이 논문은 디지털 TV 송신기의 구성 시스템 중 하나인 HPA 서브시스템(이하 HPA 시스템이라고 함)을 구현하는 구현 기술에 대하여 기술한다. HPA 시스템은 레벨 제어부, HPA 모듈, 고출력 결합기, 여파기, HPA 감시, 경보 및 제어 시스템으로 구성되어 있다. 이를 구현하기 위해서 전력레벨을 설계하고, 각 레벨에 맞는 4Wpeak, 30Wpeak, 125Wpeak 단위 증폭기를 설계, 제작 시험하였으며, 이들 단위 증폭기를 전력 분배기/결합기를 이용하여 결합하여 600Wpeak급 HPA 모듈을 제작하였다. 자체 제작한 HPA 모듈과 상용 부품을 이용하여 HPA 서브시스템을 구성하였으며, 현장시험을 통하여 그 성능을 입증하였다. 개발한 HPA 시스템은 동작주파수 470MHz-510MHz, 최대출력 1.6kWpeak, 이득 60dB 이상, 채널내 이득 평탄도 0.6dB 이하, 입력 반사손실 -l8dB이하이며, IMD는 3dB back-off시 -35dB이하이다

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.7 no.8
• /
• pp.1816-1822
• /
• 2003

We propose a novel structure of wavelength selective optical add/drop filter comprising two tap couplers and a fiber Bragg grating. The device has unique features including a simpler structure and a lower cost implementation as compared with existing device for the same operation. The filter performance has been measured and analyzed, experimentally. The implemented prototype filter shows good performance with no­crosstalk power penalty in a 155Mbps per channel wavelength­division­multiplexing transmission system but suffers from a relatively high loss of 3.5㏈ and 21㏈ for transmitted and dropped channel, respectively. While the dropped channel extinction ratio was more than 15㏈, the transmitted channel extinction ratio was more than 26㏈.

• Applied Biological Chemistry
• /
• v.43 no.4
• /
• pp.231-235
• /
• 2000

The changes of calmodulin levels, calmodulin-binding proteins, and $Ca^{2+}$/calmodulin-dependent glutamate decarboxylase during the growth of tobacco suspension cells were investigated. Tobacco cells exhibited a typical growth curve, including an exponential growth phase between 3 and 5 days after inoculation, and an apparent stationary phase occurring after 5 day. Although slight changes were observed from sample to sample, calmodulin protein levels remained similar during the phases of culture growth. Several $Ca^{2+}-dependent$ calmodulin-binding proteins including 56, 46, 36, and 32-kDa proteins were detected in tobacco cell extracts. The 56-kDa protein was identified as glutamate decarboxylase by Western-blot analysis using an anti-GAD monoclonal antibody. The levels of GAD protein and the specific activity of GAD enzyme were highest during the middle exponential phase of the culture growth cycle. These data suggest that $Ca^{2+}$/calmodulin-dependent glutamate decarboxylase is modulated during the growth of tobacco suspension cells.